If you can't tie yourself down to one woman, then being in a relationship (married, partnered, couple) is NOT for you. If you try to force it, you will just end up hurting people. Cheaters will not stop cheating, because they shouldn't be in a relationship to begin with. There is nothing wrong in being single and just have casual encounters, fubu or whatever you want to call it. This way you make yourself contented and you avoid hurting people that aren't wired the same as you.

The temporary thrill from cheating is in the same part of the brain as the high you get from drugs. It's an addiction. Requires strong will determination and discipine of the mind and body to quit. Usually starts with a thought of temptation or the environment around you. Unless you cut those out, you will probably cheat again.

Once a cheater, always a cheater. That is the hard truth. There's no second or third chance, once trust is broken it can never be undone. One can never stop cheating once started - they will always find an excuse to cheat.